极限limx→∞[(2n-1)5•(3n-5)4]/(2n+1)9=_____.
(3/2)4 分析：limn→∞[(2n-1)5•(3n-5)4/(2n+1)9] =limn→∞(2-1/n)5•(3-5/n)4/(2+1/n)9 =25•34/29=（3/2）4
极限limx→∞[(2n-1)5•(3n-5)4]/(2n+1)9=_____.
(3/2)4 分析：limn→∞[(2n-1)5•(3n-5)4/(2n+1)9] =limn→∞(2-1/n)5•(3-5/n)4/(2+1/n)9 =25•34/29=（3/2）4
